Intelligent card ink-jet printing equipment and method

Abstract

The invention discloses an intelligent card ink-jet printing device and method. The device comprises a positioning module used for positioning a card, a circulating conveying module used for conveying the card, a jet printing module used for conducting ink-jet printing on the card and an overturning module used for overturning the card. The positioning module is provided with an unprinted positioning station for positioning a card to be printed and a printed positioning station for positioning the card with one printed side; the circulating conveying module comprises a conveying bearing part and a conveying driving mechanism; two card placing positions are arranged on the conveying bearing part; the overturning module is provided with a single-printing overturning station used for overturning the card with one printed side and a full-printing overturning station used for overturning the card with two printed sides. Cards move back and forth through the same path, and the device has the advantages of being simple in structure, low in cost, small in occupied space, high in printing efficiency and the like.

Description

Technical Field

[0001] The invention relates to a smart card manufacturing technology, and in particular to a smart card inkjet printing device and method. Background Art

[0002] Plastic cards, such as financial cards (including credit and debit cards), identification cards, driver's licenses, gift cards, and other plastic cards, can be personalized with personal information of the intended cardholder. Examples of personalization include, but are not limited to, name, address, photo, account number, employee number, etc. Personal information can be applied to the card in a variety of different ways, including, but not limited to, printing on the surface of the document, storing the information on a magnetic stripe disposed on the card, and storing the information on an integrated circuit chip or smart chip embedded in the card.

[0003] Inkjet printing is a transfer process that uses an inkjet print head to print an image onto a card, such as the card printing mechanism with a card return path disclosed in the invention patent with the authorization announcement number CN111907220B, in which, after one surface of the card is processed at the card processing station, the card can be recirculated along the card return path back to the upstream of the card processing station, and then the card can be re-introduced into the main card path and transferred through the card processing station for the second time. The card can be turned over when it returns along the card return path, so that when the card is transferred back through the card processing station, the opposite surface of the card can be processed.

[0004] The above-mentioned card printing mechanism has the following disadvantages:

[0005] By setting up an independent card return path to transport the card with one side printed back to the upstream of the processing station, and then printing the other side of the card, not only is the structure complex and the production cost high, it also occupies a large space, and the printing efficiency needs to be improved. Summary of the invention

[0006] The purpose of the present invention is to overcome the above-mentioned problems and provide a smart card inkjet printing device, which uses the same path for the card to move back and forth and has the advantages of simple structure, low cost, small space occupation and high printing efficiency.

[0007] Another object of the present invention is to provide a smart card inkjet printing method.

[0008] The purpose of the present invention is achieved through the following technical solutions:

[0009] A smart card inkjet printing device comprises a positioning module for positioning a card, a circulating conveying module for conveying the card, a printing module for inkjet printing the card, and a flipping module for flipping the card; the positioning module, the printing module and the flipping module are arranged in sequence;

[0010] The positioning module is provided with an unprinted positioning station for positioning the card to be printed and a printed positioning station for positioning the card with one side printed;

[0011] The circulating conveying module comprises a conveying carrier for carrying cards and a conveying driving mechanism for driving the conveying carrier to move back and forth between the plurality of processing modules; the conveying carrier is provided with two card placement positions for placing cards;

[0012] The flip module is provided with a single-print flip station for flipping a card with one side printed and a full-print flip station for flipping a card with both sides printed.

[0013] In a preferred embodiment of the present invention, the conveying carrier is a conveying platform, and a negative pressure hole is provided on the card placement position of the conveying platform, and the negative pressure hole is connected to the negative pressure device through a negative pressure pipeline. Through the above structure, when the card is transferred to the conveying platform, the card is fixed on the conveying platform by the negative pressure, so as to maintain the correct posture for printing operation and ensure the printing accuracy.

[0014] Furthermore, the conveying drive mechanism includes a conveying drive motor and a conveying transmission assembly, the conveying transmission assembly includes a conveying transmission belt and a conveying transmission pulley, and the conveying transmission belt is fixedly connected to the conveying platform.

[0015] In a preferred embodiment of the present invention, the positioning module comprises a positioning component and a positioning drive mechanism; the positioning component is provided with two groups and is respectively located on both sides of the smart card conveying channel;

[0016] The positioning drive mechanism comprises an opening drive motor for providing an opening drive force, an opening transmission assembly for transmitting the opening drive force to the positioning assembly, and a positioning spring for pulling the positioning assembly closer to position the smart card.

[0017] In a preferred embodiment of the present invention, each group of positioning components includes a sliding mounting seat and a positioning wheel, wherein the sliding mounting seat is dynamically connected to the positioning drive mechanism; and the axis of the positioning wheel extends vertically.

[0018] Furthermore, the same group of positioning wheels has two sets and are respectively directly or indirectly arranged on the sliding mounting seat of the same group, and each set of positioning wheels has two and are arranged along a direction parallel to the smart card conveying channel. Through the above structure, two smart cards can be positioned at the same time, which is suitable for different occasions.

[0019] Furthermore, each set of positioning components also includes a conveying seat, which is fixedly connected to the corresponding sliding mounting seat, and the conveying seat is provided with a card conveying slot; a set of positioning wheels located upstream is directly or indirectly arranged on the corresponding conveying seat, and a partial wheel surface of the positioning wheel extends into the card conveying slot. Through the above structure, the card to be positioned can be conveyed to the card conveying slot of the conveying seat, and then positioned, which is conducive to the smooth transfer of smart cards.

[0020] Furthermore, one group of positioning components also includes a buffer positioning structure, the buffer positioning structure is provided with two groups and each group is provided with two buffer positioning structures;

[0021] Each buffer positioning structure includes a buffer positioning swing arm, a buffer spring and a spring mounting plate. One end of the buffer positioning swing arm is directly or indirectly rotatably connected to the sliding mounting seat, and the other end of the buffer positioning swing arm is rotatably connected to the corresponding positioning wheel; the spring mounting plate is fixedly arranged; the two ends of the buffer spring are respectively pressed against the spring mounting plate and the side surface of the buffer positioning swing arm of the same set. Through the above structure, the positioning wheel is provided with the functions of buffering and adaptive positioning, which can protect the card from being damaged.

[0022] A preferred solution of the present invention, wherein the opening drive motor is fixedly arranged on a fixed mounting seat, and the fixed mounting seat is fixedly arranged on a transverse guide column; the fixed mounting seat is located between the sliding mounting seats of the two groups of positioning components, and the sliding mounting seats of the two groups of positioning components are respectively slidably connected to the transverse guide column; the opening transmission component includes a transmission cam and a transmission roller, the transmission cam is coaxially connected to the output shaft of the opening drive motor, the transmission roller is provided with two and respectively rotatably connected to the sliding mounting seats of the two groups of positioning components, and the wheel surfaces of the two transmission rollers are both in contact with the wheel surfaces of the transmission rollers; the two ends of the positioning spring are respectively connected to the sliding mounting seats of the two groups of positioning components. Through the above structure, under the drive of the opening drive motor, the transmission cam rotates, so that the part away from the center of the circle approaches the transmission roller, prompting the two transmission rollers to move outward, thereby driving the two groups of positioning components to synchronously move away from the smart card conveying channel so that the smart card can enter or exit; at this time, the positioning spring is stretched and energy is stored. When the smart card enters between the two sets of positioning components, the driving motor is opened and driven in opposite directions, so that the part of the transmission cam away from the center of the circle is away from the transmission roller; at the same time, the positioning spring releases potential energy, pulling the sliding mounting seats of the two sets of positioning components to synchronously approach the smart card until the positioning wheels of the two sets of positioning components are respectively clamped on the two side surfaces of the smart card, limiting the smart card to the specified position, thereby completing the positioning of the smart card.

[0023] In a preferred embodiment of the present invention, the positioning module further comprises an avoidance lifting drive mechanism for driving the positioning assembly and the positioning drive mechanism to lift and lower, and the avoidance lifting drive mechanism comprises an avoidance lifting plate, an avoidance lifting drive motor and an avoidance lifting transmission assembly;

[0024] The avoidance lifting drive motor is fixedly arranged on the positioning frame; the avoidance lifting transmission assembly includes an eccentric wheel, a transmission bearing and an intermediate mounting plate, the eccentric wheel is coaxially connected with the output shaft of the avoidance lifting drive motor, and an eccentric shaft is arranged on the eccentric wheel; the transmission bearing is arranged on the eccentric shaft, and a transmission oblong hole matched with the transmission bearing is arranged on the intermediate mounting plate, and the intermediate mounting plate is fixedly connected with the avoidance lifting plate;

[0025] The positioning assembly and the positioning drive mechanism are arranged on the avoidance lifting plate. Through the above structure, under the drive of the avoidance lifting drive motor, the positioning assembly and the positioning drive mechanism can be lifted and moved, thereby avoiding the conveying carrier from approaching and preventing interference.

[0026] A preferred solution of the present invention, wherein the positioning module further comprises a rear end alignment mechanism, which comprises a swing push rod and a swing drive mechanism; the swing drive mechanism comprises a swing drive motor and a transmission shaft, the swing drive motor is connected to the swing push rod through the transmission shaft, the length direction of the swing push rod is perpendicular to the axis of the transmission shaft; the swing plane of the swing push rod is parallel to the smart card conveying channel. Through the above structure, when the smart card returns to between the positioning components for secondary positioning, the swing drive motor drives the transmission shaft to rotate in the corresponding direction, thereby driving the swing push rod to swing close to the smart card, thereby aligning the smart card downstream, so that the smart card can also be accurately positioned in the direction parallel to the smart card conveying direction.

[0027] In a preferred embodiment of the present invention, the positioning module further comprises a positioning detection sensor for detecting a working state of the positioning component and a lifting detection sensor for detecting a lifting state of the positioning component.

[0028] In a preferred embodiment of the present invention, the printing modules are provided in two groups, the group of printing modules located upstream is used for printing patterns on the cards, and the group of printing modules located downstream is used for spraying varnish on the cards.

[0029] In a preferred embodiment of the present invention, the printing module comprises an inkjet printer, an inkjet driving mechanism and a cleaning auxiliary mechanism;

[0030] The inkjet printer comprises a printing housing and a printing head, wherein the printing head is arranged in the printing housing and a printing surface of the printing head is located at the bottom of the printing housing;

[0031] The inkjet drive mechanism includes a vertical drive mechanism for driving the inkjet printer to move vertically and a horizontal drive mechanism for driving the inkjet printer to move horizontally;

[0032] The cleaning auxiliary mechanism comprises a cleaning and cleaning protective box, an elastic sealing strip and a scraper strip; the cleaning and cleaning protective box is a top-open structure, a plurality of elastic sealing strips are provided and arranged in a circle, and the top of the elastic sealing strip is higher than the top of the cleaning and cleaning protective box; in the cleaning state, the bottom surface of the printing housing is respectively in contact with the top of the plurality of elastic sealing strips, and the printing surface of the print head is located between the plurality of elastic sealing strips;

[0033] The scraper bar is arranged horizontally and the top of the scraper bar is higher than the top of the elastic sealing strip. The length direction of the scraper bar is perpendicular to the driving direction of the transverse driving mechanism. In the driving direction of the transverse driving mechanism, the length of the scraper bar is greater than the total length of the printing surface of the print head.

[0034] A preferred solution of the present invention, wherein the cleaning and protective box comprises four side panels and a bottom panel, the four side panels are fixedly connected end to end in sequence to form a rectangular structure, and the bottom panel is provided with drainage holes for discharging the collected ink.

[0035] Furthermore, the bottom plate is formed by a top plate of an inkjet printer frame.

[0036] In a preferred embodiment of the present invention, the elastic sealing strip is located in the inner cavity of the cleaning and protection box to form a circle.

[0037] Furthermore, a plurality of elastic sealing strips are fixedly connected to the inner wall of the cleaning and protection box via a mounting plate.

[0038] In a preferred embodiment of the present invention, the scraper strip is integrally arranged on the top of one of the elastic sealing strips, which is conducive to simplifying the structure.

[0039] A preferred solution of the present invention is that the scraper strip scrapes the printing surface of the printer when the lateral driving mechanism drives the inkjet printer to move in a lateral return stroke, so that the two operations are completed synchronously and more efficiently.

[0040] A preferred embodiment of the present invention, wherein the transverse driving mechanism includes a transverse moving frame, a transverse driving motor and a transverse transmission assembly, the transverse transmission assembly includes a transverse transmission screw and a transverse transmission screw nut, and the transverse transmission screw nut is fixedly connected to the transverse moving frame.

[0041] Furthermore, the lateral transmission assembly further includes a synchronous belt and two synchronous wheels, and the two synchronous wheels are coaxially arranged on the output shaft of the lateral drive motor and the lateral transmission screw respectively. Through the above structure, the lateral drive motor can be arranged above or below the lateral transmission screw to form an up-and-down layout structure, which can reduce the space occupied horizontally.

[0042] Furthermore, the vertical drive mechanism is arranged on the horizontal moving frame, and the vertical drive mechanism includes a vertical moving plate, a vertical driving motor and a vertical transmission assembly, wherein the vertical moving plate is fixedly connected to the inkjet printer; the vertical transmission assembly includes a vertical transmission screw and a vertical transmission screw nut, wherein the vertical transmission screw is connected to the vertical driving motor through a coupling, and the vertical transmission screw nut is fixedly connected to the vertical moving plate. Through the above structure, under the drive of the vertical driving motor, the vertical moving plate drives the inkjet printer to move vertically.

[0043] Furthermore, the transverse movable frame is provided with a vertical guide rod, and the vertical guide rod is connected to the vertical movable plate through a vertical guide sleeve.

[0044] In a preferred embodiment of the present invention, the flip module comprises a card clamping mechanism for clamping the card and a flip driving mechanism for driving the card clamping mechanism to flip, and the card clamping mechanism and the flip driving mechanism are each provided with two groups and arranged in parallel with the direction of card conveying;

[0045] The card clamping mechanism comprises two clamping blocks arranged opposite to each other and a clamping driving mechanism for driving the two clamping blocks to move closer to and away from each other; the two clamping blocks are respectively slidably connected to one end of the card clamping mounting seat; the card clamping driving mechanism comprises an opening driving electromagnet for providing an opening driving force, an opening transmission assembly for transmitting the opening driving force to the two clamping blocks, and a clamping spring for driving the two clamping blocks to clamp the card;

[0046] The flipping drive mechanism includes a flipping drive motor, the output shaft of which is fixedly connected to the other end of the clamping mount; the flipping drive motor is provided with a hollow structure; one end of the telescopic rod of the opening drive electromagnet passes through the hollow structure of the flipping drive motor and is connected to the opening transmission assembly, and the telescopic rod of the opening drive electromagnet is coaxial with the output shaft of the flipping drive motor.

[0047] A preferred solution of the present invention, wherein the opening transmission assembly comprises an opening rotating frame, a wedge-shaped extrusion block and an opening transmission wheel; the opening rotating frame is rotatably connected to the clamping mounting seat, with the rotation center of the opening rotating frame as the boundary, one end of the opening rotating frame is connected to one end of the telescopic rod of the opening driving electromagnet through a relatively movable structure, and the other end of the opening rotating frame is fixedly connected to the wedge-shaped extrusion block; the opening transmission wheel is provided with two and is rotatably connected to the two clamping blocks respectively.

[0048] Furthermore, a spring mounting plate is provided on the clamp mounting seat; two clamping springs and two spring mounting plates are provided, and the two ends of the clamping spring are respectively pressed against the spring mounting plate and the clamping block; when the wedge-shaped extrusion block squeezes the two open transmission wheels, the two clamping blocks move away from each other and compress their corresponding clamping springs at the same time.

[0049] Furthermore, the clamping mounting seat is provided with a clamping avoidance hole, and the clamping block is provided with a mounting portion, which passes through the clamping avoidance hole and is rotatably connected to the opening transmission wheel. This can make the structure simpler and more compact.

[0050] Furthermore, the relatively movable structure includes a hinge shaft and a hinge oblong hole, the hinge oblong hole is arranged on one end of the telescopic rod of the opening driving electromagnet, and the hinge shaft passes through the hinge oblong hole and is connected to the opening rotating frame.

[0051] In a preferred embodiment of the present invention, a guide structure is provided between the clamping block and the clamping mounting seat, the guide structure comprises a guide rail and a slider, the guide rail is fixed on the clamping mounting seat, and the slider is fixedly connected to the clamping block.

[0052] In a preferred embodiment of the present invention, the flip module further includes a rotation sensor for detecting a rotation angle.

[0053] A preferred solution of the present invention further includes an upstream card receiving module for transferring cards from other processing modules to the positioning module.

[0054] A preferred solution of the present invention further includes a feeding module for pushing out the double-sided printed cards.

[0055] A preferred solution of the present invention further comprises a drying module for drying the ink on the card, and the drying module is arranged downstream of the printing module.

[0056] A smart card inkjet printing method comprises the following steps:

[0057] The card to be printed is transported to the unprinted positioning station of the positioning module through the upstream card receiving module, and the positioning module positions the card;

[0058] The positioned card is transferred to one of the card placement positions of the conveyor carrier of the circulating conveyor module, and the conveyor carrier is driven by the conveyor drive mechanism to move downward to the inkjet station in the printing module, and the printing module performs inkjet printing on the front of the card;

[0059] The conveying drive mechanism drives the conveying carrier to move downward with the card printed on the front side. When the card enters the single printing flipping station of the flipping module, the flipping module flips the card 180 degrees and flips the card to another card placement position of the conveying carrier, with the back side of the card facing upward.

[0060] The conveying drive mechanism drives the conveying carrier to carry the card with one side printed back to the printed positioning station of the positioning module. At this time, the next card to be printed enters the unprinted positioning station of the positioning station, and the positioning module simultaneously positions the card to be printed and the card with one side printed.

[0061] After positioning, the card to be printed and the card with one side printed are respectively transferred to the two card placement positions of the conveying carrier of the circulating conveying module; the conveying carrier is driven by the conveying driving mechanism to move downward to the inkjet station in the printing module, and the printing module performs inkjet printing on the front side of the card to be printed and the back side of the card with one side printed;

[0062] After printing, the conveyor drive mechanism drives the conveyor carrier to move downward with the card with one side printed and the card with both sides printed. When the card with one side printed enters the single-printing flipping station of the flipping module and the card with both sides printed enters the full-printing flipping station, the flipping module flips the two cards 180 degrees, so that the card with one side printed is flipped to another card placement position of the conveyor carrier, and the card with both sides printed is flipped to the unloading station of the unloading module.

[0063] The card with one side printed is driven back to the printed positioning station of the positioning module by the conveying drive mechanism, and the next round of printing operation is carried out according to the above operation;

[0064] The double-sided printed cards are fed through the unloading module to complete the card printing operation.

[0065] Compared with the prior art, the present invention has the following beneficial effects:

[0066] The inkjet printing device of the present invention adopts the same circulating conveying module to convey different cards at the same time, and completes the printing operation of different surfaces back and forth on the same path, and has the advantages of simple structure, low cost, small space occupation, high printing efficiency, etc. BRIEF DESCRIPTION OF THE DRAWINGS

[0067] Figure 1 It is a schematic diagram of the three-dimensional structure of the smart card inkjet printing device of the present invention.

[0068] Figure 2-3 The three-dimensional structure diagrams of the positioning module of the present invention are shown in two different viewing angles.

[0069] Figure 4 It is a three-dimensional structural schematic diagram of the positioning assembly and the positioning drive mechanism of the positioning module of the present invention.

[0070] Figure 5 It is a schematic exploded view of the three-dimensional structure of the avoidance lifting drive mechanism of the positioning module of the present invention.

[0071] Figure 6 It is a side view of the printing module of the present invention.

[0072] Figure 7-8 Schematic diagrams of the three-dimensional structure of the printing module of the present invention from two different viewing angles.

[0073] Fig. 9 It is a three-dimensional structural schematic diagram of the cleaning auxiliary mechanism of the printing module of the present invention.

[0074] Figure 10-11 The figures are side views of two different working states of the cleaning auxiliary mechanism of the printing module of the present invention.

[0075] Figure 12-13 The diagram is a schematic three-dimensional structure diagram of the flip module of the present invention from two different viewing angles.

[0076] Fig.14 It is a side view of the flip module of the present invention.

[0077] Figure 15-Figure 22 It is a simplified diagram of multiple different working states of the smart card inkjet printing device of the present invention. DETAILED DESCRIPTION

[0078] In order to enable those skilled in the art to better understand the technical solution of the present invention, the present invention is further described below in conjunction with embodiments and drawings, but the embodiments of the present invention are not limited thereto.

[0079] See also Figure 1 The smart card inkjet printing device of this embodiment includes an upstream card receiving module A for transferring cards from other processing modules, a positioning module B for positioning cards, a circulating conveying module C for conveying cards, a printing module D for inkjet printing on cards, a drying module E for drying ink on cards, a flipping module F for flipping cards, and a feeding module G for pushing out double-sided printed cards; the upstream card receiving module A, the positioning module B, the printing module D, the drying module E, the flipping module F, and the feeding module G are arranged in sequence.

[0080] See also Figure 2-4 The positioning module B includes a positioning component, a positioning drive mechanism and an avoidance lifting drive mechanism for driving the positioning component and the positioning drive mechanism to lift and lower. The positioning component is provided with two groups and is respectively located on both sides of the smart card conveying channel; wherein each group of positioning components includes a sliding mounting seat 1b and a positioning wheel 2b, and the sliding mounting seat 1b is dynamically connected to the positioning drive mechanism; the axis of the positioning wheel 2b extends vertically.

[0081] Further, the same group of positioning wheels 2b has two sets and are respectively directly or indirectly arranged on the sliding mounting seat 1b of the same group, and each set of positioning wheels 2b has two and are arranged along a direction parallel to the smart card conveying channel. Through the above structure, two smart cards can be positioned at the same time, which is suitable for different occasions.

[0082] Furthermore, each set of positioning components also includes a conveying seat 3b, which is fixedly connected to the corresponding sliding mounting seat 1b, and the conveying seat 3b is provided with a card conveying slot 3-1b; a set of positioning wheels 2b located upstream is directly or indirectly arranged on the corresponding conveying seat 3b, and a partial wheel surface of the positioning wheel 2b extends into the card conveying slot 3-1b. Through the above structure, the card to be positioned can be conveyed to the card conveying slot 3-1b of the conveying seat 3b, and then positioned, which is conducive to the smooth transfer of smart cards.

[0083] Furthermore, one group of positioning components also includes a buffer positioning structure, which is provided with two groups and each group is provided with two buffer positioning structures; each buffer positioning structure includes a buffer positioning swing arm 4b, a buffer spring (not shown in the figure) and a spring mounting plate 5b, one end of the buffer positioning swing arm 4b is directly or indirectly rotatably connected to the sliding mounting seat 1b, and the other end of the buffer positioning swing arm 4b is rotatably connected to the corresponding positioning wheel 2b; the spring mounting plate 5b is fixedly arranged; the two ends of the buffer spring are respectively pressed against the spring mounting plate 5b and the side of the buffer positioning swing arm 4b of the same group. Through the above structure, the positioning wheel 2b is provided with the functions of buffering and adaptive positioning, which can protect the card from being damaged.

[0084] See also Figure 2-4The positioning drive mechanism includes an opening drive motor 7b for providing an opening drive force, an opening transmission component for transmitting the opening drive force to the positioning component, and a positioning spring 8b for pulling the positioning component closer to position the smart card. The opening drive motor 7b is fixedly arranged on a fixed mounting seat 9b, which is fixedly arranged on a transverse guide column; the fixed mounting seat 9b is located between the sliding mounting seats 1b of the two groups of positioning components, and the sliding mounting seats 1b of the two groups of positioning components are respectively slidably connected to the transverse guide column; the opening transmission component includes a transmission cam 10b and a transmission roller 11b, the transmission cam 10b is coaxially connected to the output shaft of the opening drive motor 7b, and the transmission roller 11b is provided with two and respectively rotatably connected to the sliding mounting seats 1b of the two groups of positioning components, and the wheel surfaces of the two transmission rollers 11b are both in contact with the wheel surfaces of the transmission roller 11b; the two ends of the positioning spring 8b are respectively connected to the sliding mounting seats 1b of the two groups of positioning components. Through the above structure, under the drive of the open drive motor 7b, the transmission cam 10b rotates, so that the part away from the center of the circle is close to the transmission roller 11b, prompting the two transmission rollers 11b to move outward, thereby driving the two sets of positioning components to synchronously move away from the smart card conveying channel so that the smart card can enter or exit; at this time, the positioning spring 8b is stretched and stored. When the smart card enters between the two sets of positioning components, the driving motor 7b is opened and driven in the opposite direction, so that the part of the transmission cam 10b away from the center of the circle is away from the transmission roller 11b; at the same time, the positioning spring 8b releases potential energy, pulling the sliding mounting seats 1b of the two sets of positioning components to synchronously approach the smart card, until the positioning wheels 2b of the two sets of positioning components are respectively clamped on the two sides of the smart card, and the smart card is limited to the specified position, thereby completing the positioning of the smart card.

[0085] See also Figure 5 The avoidance lifting drive mechanism includes a avoidance lifting plate 12b, a avoidance lifting drive motor 13b and a avoidance lifting transmission assembly; the avoidance lifting drive motor 13b is fixedly arranged on the positioning frame 14b; the avoidance lifting transmission assembly includes an eccentric wheel 15b, a transmission bearing 16b and an intermediate mounting plate 17b, the eccentric wheel 15b is coaxially connected with the output shaft of the avoidance lifting drive motor 13b, and the eccentric wheel 15b is provided with an eccentric shaft; the transmission bearing 16b is arranged on the eccentric shaft, and the intermediate mounting plate 17b is provided with a transmission oblong hole 17-1b matched with the transmission bearing 16b, and the intermediate mounting plate 17b is fixedly connected with the avoidance lifting plate 12b; the positioning assembly and the positioning drive mechanism are arranged on the avoidance lifting plate 12b. Through the above structure, under the drive of the avoidance lifting drive motor 13b, the positioning assembly and the positioning drive mechanism can be lifted and moved, so as to avoid the conveying platform 1c of the circulation conveying module C from approaching to prevent interference.

[0086] See also Figure 2-4 , this embodiment also includes a rear end alignment mechanism, which includes a swing push rod 18b and a swing drive mechanism; the swing drive mechanism includes a swing drive motor 19b and a transmission shaft 20b, the swing drive motor 19b is connected to the swing push rod 18b through the transmission shaft 20b, the length direction of the swing push rod 18b is perpendicular to the axis of the transmission shaft 20b; the swing plane of the swing push rod 18b is parallel to the smart card conveying channel. Through the above structure, when the smart card returns to between the positioning components for secondary positioning, the transmission shaft 20b is driven to rotate in the corresponding direction by the swing drive motor 19b, thereby driving the swing push rod 18b to swing close to the smart card, so as to align the smart card downstream, so that the smart card can also be accurately positioned in the direction parallel to the smart card conveying direction.

[0087] See also Figure 2-3 This embodiment also includes a positioning detection sensor 21b for detecting the working state of the positioning component and a lifting detection sensor 22 for detecting the lifting state of the positioning component.

[0088] See also Figure 2-4 , the working principle of the positioning module of this embodiment is:

[0089] During operation, before the card moves between the positioning components, the drive motor 7b is opened to drive the lower transmission cam 10b to rotate, so that the part of the transmission cam 10b away from the center of the circle is close to the transmission roller 11b, prompting the two transmission rollers 11b to move outward, thereby driving the two groups of positioning components to synchronously move away from the smart card conveying channel so that the smart card can enter or exit; at this time, the positioning spring 8b is stretched and energy is stored.

[0090] When the upstream card receiving module A pushes the card between the positioning components, the drive motor 7b is opened and driven in the opposite direction, so that the part of the transmission cam 10b away from the center of the circle is away from the transmission roller 11b; at the same time, the positioning spring 8b releases potential energy, pulling the sliding mounting seats 1b of the two sets of positioning components to approach the smart card synchronously, until the positioning wheels 2b of the two sets of positioning components are respectively clamped on the two side surfaces of the smart card, limiting the smart card to the specified position, thereby completing the positioning of the smart card.

[0091] See also Figure 1The circulating conveying module C includes a conveying carrier for carrying cards and a conveying driving mechanism for driving the conveying carrier to move back and forth between multiple processing modules; the conveying carrier is provided with two card placement positions for placing cards; wherein the conveying carrier is a conveying platform 1c, and a negative pressure hole is provided on the card placement position of the conveying platform 1c, and the negative pressure hole is connected to the negative pressure device through a negative pressure pipeline. Through the above structure, when the card is transferred to the conveying platform 1c, the card is fixed on the conveying platform 1c by the negative pressure, so as to maintain the correct posture for printing operation and ensure the printing accuracy.

[0092] Furthermore, the conveying drive mechanism includes a conveying drive motor and a conveying transmission assembly, the conveying transmission assembly includes a conveying transmission belt and a conveying transmission pulley, and the conveying transmission belt is fixedly connected to the conveying platform 1c.

[0093] See also Figure 1 The printing modules D are provided with two groups, one group of printing modules D located upstream is used for printing patterns on the card, and the other group of printing modules D located downstream is used for spraying varnish on the card.

[0094] See also Figure 6-8 The printing module D includes an inkjet printer frame 1d, an inkjet printer, an inkjet driving mechanism and a cleaning auxiliary mechanism; the inkjet printer includes a printing shell 2d and a print head 3d, the print head 3d is arranged in the printing shell 2d and the printing surface of the print head 3d is located at the bottom of the printing shell 2d; the inkjet driving mechanism includes a vertical driving mechanism for driving the inkjet printer to move vertically and a horizontal driving mechanism for driving the inkjet printer to move horizontally.

[0095] See also Figure 9-11 The cleaning auxiliary mechanism includes a cleaning and cleaning protective box 4d, an elastic sealing strip 5d and a scraper strip 6d; the cleaning and cleaning protective box 4d is a top-open structure, and the elastic sealing strip 5d is provided in plurality and arranged in a circle, and the top of the elastic sealing strip 5d is higher than the top of the cleaning and cleaning protective box 4d; in the cleaning state, the bottom surface of the printing shell 2d is respectively in contact with the top of the plurality of elastic sealing strips 5d, and the printing surface of the print head 3d is located between the plurality of elastic sealing strips 5d; the scraper strip 6d is horizontally arranged and the top of the scraper strip 6d is higher than the top of the elastic sealing strip 5d, and the length direction of the scraper strip 6d is perpendicular to the driving direction of the transverse driving mechanism; in the driving direction of the transverse driving mechanism, the length of the scraper strip 6d is greater than the total length of the printing surface of the print head 3d.

[0096] See also Figure 9-11The cleaning and protection box 4d includes four side panels and a bottom panel. The four side panels are fixedly connected end to end in sequence to form a rectangular structure. The bottom panel is provided with drainage holes for discharging the collected ink.

[0097] Furthermore, the bottom plate is formed by the top plate of the inkjet printer frame 1d.

[0098] See also Figure 9-11 The elastic sealing strip 5d is located in the inner cavity of the cleaning and protection box 4d and forms a circle.

[0099] Furthermore, the plurality of elastic sealing strips 5d are fixedly connected to the inner wall of the cleaning and protection box 4d through the mounting plate 7d.

[0100] See also Figure 9-11 The scraper strip 6d is integrally arranged on the top of one of the elastic sealing strips 5d, which is conducive to simplifying the structure.

[0101] See also Figure 9-11 The scraper strip 6d scrapes the printing surface of the printer when the lateral driving mechanism drives the inkjet printer to move in a lateral return stroke, so that the two operations are completed synchronously and more efficiently.

[0102] See also Figure 6-8 The transverse driving mechanism includes a transverse moving frame 8d, a transverse driving motor 9d and a transverse transmission assembly. The transverse transmission assembly includes a transverse transmission screw and a transverse transmission screw nut. The transverse transmission screw nut is fixedly connected to the transverse moving frame 8d.

[0103] Furthermore, the lateral transmission assembly further includes a synchronous belt and two synchronous wheels, which are coaxially arranged on the output shaft of the lateral drive motor 9d and the lateral transmission screw rod. Through the above structure, the lateral drive motor 9d can be arranged above or below the lateral transmission screw rod to form an up-and-down layout structure, which can reduce the space occupied in the lateral direction.

[0104] Furthermore, the vertical drive mechanism is arranged on the horizontal moving frame 8d, and the vertical drive mechanism includes a vertical moving plate 10d, a vertical driving motor 11d and a vertical transmission assembly, wherein the vertical moving plate 10d is fixedly connected to the inkjet printer; the vertical transmission assembly includes a vertical transmission screw and a vertical transmission screw nut, wherein the vertical transmission screw is connected to the vertical driving motor 11d through a coupling, and the vertical transmission screw nut is fixedly connected to the vertical moving plate 10d. Through the above structure, under the drive of the vertical driving motor 11d, the vertical moving plate 10d drives the inkjet printer to move vertically.

[0105] Furthermore, a vertical guide rod 12d is provided on the transverse moving frame 8d, and the vertical guide rod 12d is connected to the vertical moving plate 10d through a vertical guide sleeve 13d.

[0106] See also Figure 6-11 The working principle of the printing module of this embodiment is:

[0107] When working, the inkjet printer is first driven by the vertical driving mechanism and the horizontal driving mechanism to move to the top of the cleaning protection box 4d, and then the inkjet printer is driven by the vertical driving mechanism to move downward until the bottom surface of the printing shell 2d is attached to the top of the multiple elastic sealing strips 5d and the scraper strip 6d. Fig.10 At this time, the printing surface of the print head 3d is located between the multiple elastic sealing strips 5d, and the lower area of ​​the printing surface is surrounded by the cleaning and protection box 4d and the elastic sealing strip 5d; the print head 3d ejects pulse ink to clean or moisturize the internal nozzle holes, and at this time, the cleaning and protection box 4d and the elastic sealing strip 5d are protected to prevent ink from splashing to other device modules around; when the cleaning or moisturizing is completed, the inkjet printer is driven to move upward for a small distance through the vertical driving mechanism, so that the bottom surface of the printing shell 2d is away from the top of the multiple elastic sealing strips 5d but still fits with the top of the scraper strip 6d, and then the inkjet printer is driven to move horizontally through the horizontal driving mechanism, and the scraper strip 6d scrapes off the ink remaining on the printing surface of the print head 3d. Fig.11 , and completely complete the cleaning of the print head 3d.

[0108] See also Figure 12-14 The flip module F includes a card clamping mechanism for clamping the card and a flip driving mechanism for driving the card clamping mechanism to flip, and the card clamping mechanism and the flip driving mechanism are both provided with two groups and are arranged along a direction parallel to the card conveying; the card clamping mechanism includes two clamping blocks 1f arranged opposite to each other and a card clamping driving mechanism for driving the two clamping blocks 1f to move closer to and away from each other; the two clamping blocks 1f are respectively slidably connected to one end of the card clamping mounting seat 2f; the card clamping driving mechanism includes an opening driving electromagnet 3f for providing an opening driving force, an opening transmission assembly for transmitting the opening driving force to the two clamping blocks 1f, and a clamping spring 4f for driving the two clamping blocks 1f to clamp the card.

[0109] See also Figure 12-14The opening transmission assembly includes an opening rotating frame 5f, a wedge-shaped extrusion block 6f and an opening transmission wheel 7f; the opening rotating frame 5f is rotatably connected to the clamping mounting seat 2f, with the rotation center of the opening rotating frame 5f as the boundary, one end of the opening rotating frame 5f is connected to one end of the telescopic rod 3-1f of the opening driving electromagnet 3f through a relatively movable structure, and the other end of the opening rotating frame 5f is fixedly connected to the wedge-shaped extrusion block 6f; the opening transmission wheel 7f is provided with two and is rotatably connected to the two clamping blocks 1f respectively.

[0110] Furthermore, a spring mounting plate 8f is provided on the clamping mounting seat 2f; two clamping springs 4f and two spring mounting plates 8f are provided, and the two ends of the clamping spring 4f are respectively pressed against the spring mounting plate 8f and the clamping block 1f; when the wedge-shaped extrusion block 6f squeezes the two opening transmission wheels 7f, the two clamping blocks 1f move away from each other and compress their corresponding clamping springs 4f at the same time.

[0111] Furthermore, the clamping mounting seat 2f is provided with a clamping avoidance hole, and the clamping block 1f is provided with a mounting portion, which passes through the clamping avoidance hole and is rotatably connected to the opening transmission wheel 7f. This can make the structure simpler and more compact.

[0112] Furthermore, the relatively movable structure includes a hinge shaft and a hinge oblong hole, the hinge oblong hole is arranged on one end of the telescopic rod 3-1f of the opening driving electromagnet 3f, and the hinge shaft passes through the hinge oblong hole and is connected to the opening rotating frame 5f.

[0113] See also Figure 12-14 A guiding structure is provided between the clamping block 1f and the clamping mounting seat 2f, and the guiding structure includes a guide rail and a slider 9f. The guide rail is fixed on the clamping mounting seat 2f, and the slider 9f is fixedly connected to the clamping block 1f.

[0114] See also Figure 12-14 The flipping drive mechanism includes a flipping drive motor 10f, the output shaft of which is fixedly connected to the other end of the clamping mount 2f; the flipping drive motor 10f is provided with a hollow structure; one end of the telescopic rod 3-1f of the opening drive electromagnet 3f passes through the hollow structure of the flipping drive motor 10f and is connected to the opening transmission assembly, and the telescopic rod 3-1f of the opening drive electromagnet 3f is coaxial with the output shaft of the flipping drive motor 10f.

[0115] See also Figure 12-14 , this embodiment further includes a rotation sensor 11f for detecting a rotation angle.

[0116] See also Figure 12-14 The working principle of the flip module of this embodiment is:

[0117] When working, before the card is delivered, the telescopic rod 3-1f of the driving electromagnet 3f is opened to drive the opening rotating frame 5f to rotate in the corresponding direction, and then drive the wedge-shaped extrusion block 6f connected to the other end of the opening rotating frame 5f to approach the two opening transmission wheels 7f, and then the opening transmission wheel 7f squeezes the two opening transmission wheels 7f in the middle of the two opening transmission wheels 7f, so that the two opening transmission wheels 7f and the corresponding clamping blocks 1f move away from each other, thereby forming a clamping space; at this time, as the two clamping blocks 1f move away from each other, the corresponding clamping spring 4f is gradually compressed, so that the clamping spring 4f accumulates energy. When the card enters the clamping space, the telescopic rod 3-1f of the driving electromagnet 3f is opened to drive the opening rotating frame 5f to rotate in the opposite direction, driving the wedge-shaped extrusion block 6f away from the two opening transmission wheels 7f; at the same time, the two clamping springs 4f begin to release potential energy to restore deformation, and respectively drive the two clamping blocks 1f to move closer to each other until the card is clamped. Finally, the card clamping mounting seat 2f is driven to flip by the flipping driving motor 10f, so that the smart card can be flipped 180 degrees.

[0118] See also Figure 1 and Figure 15-22 The smart card inkjet printing method of this embodiment includes the following steps:

[0119] The card to be printed is conveyed to the unprinted positioning station b-1 of the positioning module B through the upstream card receiving module A. The positioning module B is provided with the unprinted positioning station b-1 for positioning the card to be printed and the printed positioning station b-2 for positioning the card with one side printed. The upstream card receiving module A completes the positioning in the direction parallel to the conveying direction of the smart card, and then the positioning module B positions the card in the direction perpendicular to the conveying direction of the smart card, such as Fig.15 .

[0120] The positioned card is transferred to one of the card placement positions of the conveying platform 1c of the circulating conveying module C, and the conveying platform 1c is driven by the conveying driving mechanism to move downward to the inkjet station in the printing module D, and the printing module D performs inkjet printing on the front of the card. Fig.16 .

[0121] The conveying driving mechanism drives the conveying platform 1c to move downward with the card printed on the front side. When the card enters the single printing and flipping station f-1 of the flipping module F, Fig.17 The card is flipped 180 degrees by the flip module F, and the card is flipped to another card placement position on the conveying platform 1c, such as Fig.18 The flip module F is provided with a single-print flip station f-1 for flipping a card with one side printed and a full-print flip station f-2 for flipping a card with both sides printed.

[0122] The conveying platform 1c is driven by the conveying driving mechanism to carry the card with one side printed back to the printed positioning station b-2 of the positioning module B. At this time, the next card to be printed enters the unprinted positioning station b-1 of the positioning station. The positioning module B simultaneously positions the card to be printed and the card with one side printed. Fig.19 .

[0123] After positioning, the card to be printed and the card with one side printed are transferred to the two card placement positions of the conveying platform 1c of the circulating conveying module C respectively; the conveying platform 1c is driven by the conveying driving mechanism to move downward to the inkjet station in the printing module D, and the printing module D performs inkjet printing on the front side of the card to be printed and the back side of the card with one side printed, as shown in FIG. Fig. 20 .

[0124] After printing, the conveying drive mechanism drives the conveying platform 1c to move downward with the card with one side printed and the card with both sides printed. When the card with one side printed enters the single-printing flipping station f-1 of the flipping module F and the card with both sides printed enters the full-printing flipping station f-2, as shown in FIG. Fig.21 , the two cards are flipped 180 degrees by the flip module F, so that the card with one side printed is flipped to another card placement position on the conveying platform 1c, and the card with both sides printed is flipped to the unloading station of the unloading module G, such as Fig. 22 .

[0125] The card with one side printed is driven back to the printed positioning station b-2 of the positioning module B by the conveying drive mechanism, and the next round of printing operation is performed according to the above operation.

[0126] The double-sided printed cards are fed down through the unloading module G to complete the card printing operation.

[0127] The above is a preferred embodiment of the present invention, but the embodiment of the present invention is not limited to the above content. Any other changes, modifications, substitutions, combinations, and simplifications made without departing from the spirit and principles of the present invention should be equivalent replacement methods and are included in the protection scope of the present invention.

Claims

1. A smart card inkjet printing device, characterized in that: It includes a positioning module for positioning the card, a circulating conveying module for conveying the card, a printing module for inkjet printing the card, and a flipping module for flipping the card; the positioning module, the printing module and the flipping module are arranged in sequence; The positioning module is provided with an unprinted positioning station for positioning the card to be printed and a printed positioning station for positioning the card with one side printed; The circulating conveying module comprises a conveying carrier for carrying cards and a conveying driving mechanism for driving the conveying carrier to move back and forth between the plurality of processing modules; the conveying carrier is provided with two card placement positions for placing cards; The flip module is provided with a single-print flip station for flipping a card with one side printed and a full-print flip station for flipping a card with both sides printed.

2. The smart card inkjet printing device according to claim 1, characterized in that: The conveying carrier is a conveying platform, and a negative pressure hole is provided on the card placement position of the conveying platform, and the negative pressure hole is connected with the negative pressure device through a negative pressure pipeline.

3. The smart card inkjet printing device according to claim 1, characterized in that: The positioning module includes a positioning component and a positioning drive mechanism; the positioning component is provided with two groups and is respectively located on both sides of the smart card conveying channel; The positioning drive mechanism comprises an opening drive motor for providing an opening drive force, an opening transmission assembly for transmitting the opening drive force to the positioning assembly, and a positioning spring for pulling the positioning assembly closer to position the smart card.

4. The smart card inkjet printing device according to claim 3, characterized in that: Each positioning assembly includes a sliding mounting seat and a positioning wheel, wherein the sliding mounting seat is connected to the positioning drive mechanism in a dynamic manner; the axis of the positioning wheel extends vertically; The same group of positioning wheels is provided with two sets and are respectively directly or indirectly arranged on the sliding mounting seats of the same group, and each set of positioning wheels is provided with two and are arranged in a direction parallel to the smart card conveying channel; One group of positioning components also includes a buffer positioning structure, which is provided with two groups and each group is provided with two buffer positioning structures; each buffer positioning structure includes a buffer positioning swing arm, a buffer spring and a spring mounting plate, one end of the buffer positioning swing arm is directly or indirectly rotatably connected to the sliding mounting seat, and the other end of the buffer positioning swing arm is rotatably connected to the corresponding positioning wheel; the spring mounting plate is fixedly arranged; the two ends of the buffer spring are respectively pressed against the side surfaces of the spring mounting plate and the buffer positioning swing arm of the same group.

5. The smart card inkjet printing device according to claim 4, characterized in that: The opening drive motor is fixedly arranged on a fixed mounting seat, and the fixed mounting seat is fixedly arranged on a transverse guide column; the fixed mounting seat is located between the sliding mounting seats of the two groups of positioning components, and the sliding mounting seats of the two groups of positioning components are respectively slidably connected to the transverse guide column; the opening transmission component includes a transmission cam and a transmission roller, the transmission cam is coaxially connected to the output shaft of the opening drive motor, and the transmission roller is provided with two and is respectively rotatably connected to the sliding mounting seats of the two groups of positioning components, and the wheel surfaces of the two transmission rollers are both in contact with the wheel surfaces of the transmission rollers; the two ends of the positioning spring are respectively connected to the sliding mounting seats of the two groups of positioning components.

6. The smart card inkjet printing device according to claim 1, characterized in that: The printing module includes an inkjet printer, an inkjet drive mechanism and a cleaning auxiliary mechanism; The inkjet printer comprises a printing housing and a printing head, wherein the printing head is arranged in the printing housing and a printing surface of the printing head is located at the bottom of the printing housing; The inkjet drive mechanism includes a vertical drive mechanism for driving the inkjet printer to move vertically and a horizontal drive mechanism for driving the inkjet printer to move horizontally; The cleaning auxiliary mechanism comprises a cleaning and cleaning protective box, an elastic sealing strip and a scraper strip; the cleaning and cleaning protective box is a top-open structure, a plurality of elastic sealing strips are provided and arranged in a circle, and the top of the elastic sealing strip is higher than the top of the cleaning and cleaning protective box; in the cleaning state, the bottom surface of the printing housing is respectively in contact with the top of the plurality of elastic sealing strips, and the printing surface of the print head is located between the plurality of elastic sealing strips; The scraper bar is arranged horizontally and the top of the scraper bar is higher than the top of the elastic sealing strip. The length direction of the scraper bar is perpendicular to the driving direction of the transverse driving mechanism. In the driving direction of the transverse driving mechanism, the length of the scraper bar is greater than the total length of the printing surface of the print head.

7. The smart card inkjet printing device according to claim 6, characterized in that: The cleaning and protection box comprises four side panels and a bottom panel, the four side panels are fixedly connected end to end in sequence to form a rectangular structure, and the bottom panel is provided with drainage holes for discharging the collected ink; The elastic sealing strips are arranged in a circle in the inner cavity of the cleaning and protection box, and a plurality of elastic sealing strips are fixedly connected to the inner wall of the cleaning and protection box through a mounting plate; the scraping strip is integrally arranged on the top of one of the elastic sealing strips.

8. The smart card inkjet printing device according to claim 1, characterized in that: The flip module includes a card clamping mechanism for clamping the card and a flip driving mechanism for driving the card clamping mechanism to flip, and the card clamping mechanism and the flip driving mechanism are each provided with two groups and arranged along a direction parallel to the card conveying direction; The card clamping mechanism comprises two clamping blocks arranged opposite to each other and a clamping driving mechanism for driving the two clamping blocks to move closer to and away from each other; the two clamping blocks are respectively slidably connected to one end of the card clamping mounting seat; the card clamping driving mechanism comprises an opening driving electromagnet for providing an opening driving force, an opening transmission assembly for transmitting the opening driving force to the two clamping blocks, and a clamping spring for driving the two clamping blocks to clamp the card; The flipping drive mechanism includes a flipping drive motor, the output shaft of which is fixedly connected to the other end of the clamping mount; the flipping drive motor is provided with a hollow structure; one end of the telescopic rod of the opening drive electromagnet passes through the hollow structure of the flipping drive motor and is connected to the opening transmission assembly, and the telescopic rod of the opening drive electromagnet is coaxial with the output shaft of the flipping drive motor.

9. The smart card inkjet printing device according to claim 8, characterized in that: The opening transmission assembly comprises an opening rotating frame, a wedge-shaped extrusion block and an opening transmission wheel; the opening rotating frame is rotatably connected to the clamping mounting seat, with the rotation center of the opening rotating frame as the boundary, one end of the opening rotating frame is connected to one end of the telescopic rod of the opening driving electromagnet through a relatively movable structure, and the other end of the opening rotating frame is fixedly connected to the wedge-shaped extrusion block; the opening transmission wheel is provided with two and is rotatably connected to the two clamping blocks respectively; A spring mounting plate is provided on the clamping mounting seat; two clamping springs and two spring mounting plates are provided, and the two ends of the clamping spring are respectively pressed against the spring mounting plate and the clamping block; when the wedge-shaped extrusion block squeezes the two opening transmission wheels, the two clamping blocks move away from each other and compress their corresponding clamping springs at the same time.

10. A method applied to the smart card inkjet printing device according to any one of claims 1 to 9, characterized in that: The following steps are involved: The card to be printed is transported to the unprinted positioning station of the positioning module through the upstream card receiving module, and the positioning module positions the card; The positioned card is transferred to one of the card placement positions of the conveyor carrier of the circulating conveyor module, and the conveyor carrier is driven by the conveyor drive mechanism to move downward to the inkjet station in the printing module, and the printing module performs inkjet printing on the front of the card; The conveying drive mechanism drives the conveying carrier to move downward with the card printed on the front side. When the card enters the single printing flipping station of the flipping module, the flipping module flips the card 180 degrees and flips the card to another card placement position of the conveying carrier, with the back side of the card facing upward. The conveying drive mechanism drives the conveying carrier to carry the card with one side printed back to the printed positioning station of the positioning module. At this time, the next card to be printed enters the unprinted positioning station of the positioning station, and the positioning module simultaneously positions the card to be printed and the card with one side printed. After positioning, the card to be printed and the card with one side printed are respectively transferred to the two card placement positions of the conveying carrier of the circulating conveying module; the conveying carrier is driven by the conveying driving mechanism to move downward to the inkjet station in the printing module, and the printing module performs inkjet printing on the front side of the card to be printed and the back side of the card with one side printed; After printing, the conveyor drive mechanism drives the conveyor carrier to move downward with the card with one side printed and the card with both sides printed. When the card with one side printed enters the single-printing flipping station of the flipping module and the card with both sides printed enters the full-printing flipping station, the flipping module flips the two cards 180 degrees, so that the card with one side printed is flipped to another card placement position of the conveyor carrier, and the card with both sides printed is flipped to the unloading station of the unloading module. The card with one side printed is driven back to the printed positioning station of the positioning module by the conveying drive mechanism, and the next round of printing operation is carried out according to the above operation; The double-sided printed cards are fed through the unloading module to complete the card printing operation.

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